Beckhoff CX51x0, Руководство пользователя

Страница: 39 / 95

Commissioning
CX51x0 39 Version: 2.8
6.2 Connecting the power supply
NOTE
Damage to the Embedded PCs
The Embedded PCs may be damaged during wiring.
• The cables for the power supply should only be connected in de-energized state.
The power supply terminals require an external voltage source, which provides 24 V DC (-15% / +20%). The
power supply terminal must provide 4 A at 24 V, in order to ensure the operation of the Embedded PCs in all
situations.
The cabling of the Embedded PC in the control cabinet must be done in accordance with the standard EN
60204-1:2006 PELV = Protective Extra Low Voltage:
• The "PE" and "0 V" conductors of the voltage source for a basic CPU module must be on the same
potential (connected in the control cabinet).
• Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or a point of the
energy source for this circuit must be connected to the protective earth conductor system.
Connection example
1
2
3
4
8
Table 26: Legend for the connection example
No. Description
1 The upper spring-loaded terminals (Us) identified with “24 V“ and “0 V“ supply the
Embedded PC and the Terminal Bus (data transfer via K- or E-bus).
2 The spring-loaded terminals (Up) identified as "+", "-" and "PE" supply the Bus Terminals
via the power contacts and the sensors or actuators connected to the Bus Terminals.
Fuse protection
• When dimensioning the fuse for the system voltage (Us), observe the max. power consumption of the
Embedded PC (see: Technical Data [
}
85] ).
• Protect power contacts (Up) with a fuse of max. 10 A (slow blow).